import re
from typing import Dict

# Warning: If you change this parsing, please test using
#   zerver/tests/test_decorators.py
# And extend zerver/tests/fixtures/user_agents_unique with any new test cases
def parse_user_agent(user_agent: str) -> Dict[str, str]:
    match = re.match(
        """^ (?P<name> [^/ ]* [^0-9/(]* )
             (/ (?P<version> [^/ ]* ))?
             ([ /] .*)?
           $""", user_agent, re.X)
    assert match is not None
    return match.groupdict()
